A 10-year-old girl presents with left eye pain 1 day after being hit in the face with a palm tree leaf that sprang back at her while playing. She immediately complained of eye pain, tearing, and blurry vision following the incident. Her pain is improving today, but the tearing and blurred vision remain, and the eye still looks red. She has no fever or headache, and she does not wear glasses or contact lenses. Her past medical history is unremarkable.

Physical examination reveals a well-appearing girl in no acute distress, who prefers to keep her left eye closed. Vital signs are normal and visual acuity is 20/15 in the right eye and 20/200 in the left eye. She has no signs of head or facial trauma. She has moderate photophobia, increased tear production, and significant conjunctival injection in the left eye. Extraocular movements are normal. There is no anisocoria, subconjunctival...

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